CVE-2023-35137 Auth bypass in NAS326 firmware
An unauthenticated attacker can obtain system information by sending a crafted URL to vulnerable Zyxel NAS devices due to improper authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-35137?
CVE-2023-35137 is a high-severity authentication bypass vulnerability in Zyxel NAS326 firmware, published on 30 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An improper authentication vulnerability in the authentication module of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to obtain system information by sending a crafted URL to a vulnerable device.
Weakness: CWE-287
Which versions are affected by CVE-2023-35137?
It affects 2 products.
Products include Zyxel Nas326 Firmware, Zyxel Nas542 Firmware.
How do I fix CVE-2023-35137?
No fix has been published for CVE-2023-35137 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2023-35137 being exploited?
There is no known exploitation of CVE-2023-35137 in the wild and no public exploit code.
Other vulnerabilities in Zyxel NAS326 firmware
Sources
Also known as GHSA-vpqc-4qh3-4hw3.